body {
    font-family:helvetica,tahoma,verdana,sans-serif;
    padding:20px;
    font-size:13px;
    margin:0;
}
h2 {
    font-size:18px;
    font-weight:bold;
    margin:0;
    margin-bottom:15px;
}
.demo-info{
  background:#FFFEE6;
  color:#8F5700;
  padding:12px;
}
.demo-tip{
  width:16px;
  height:16px;
  margin-right:8px;
  float:left;
}
.header{
  height:60px;
  background:#B3DFDA;
  padding:10px;
   display: flex;
  justify-content:space-between;
  align-items:center;
}
.header .logo{
  height:60px;
  color:#111;
  display:flex;
  align-items:center;
}
.header .logo img{
  width:100px;
  height:40px
}
.header .logo span{
  display:block;
  margin-left:30px;
  font-size:20px;
}
.header .btn-group{
  margin-right:10px;
}
.header .btn-group span{
  margin-left:10px;
  padding:5px;
  border:1px solid #fff;
  border-radius:4px;
  display:inline-block;
  color:#666;
  cursor:pointer;
}
.footer{
  background:#A9FACD;  
  text-align:center;
}